Title:Effect of Cooking Procedure on B1, B2, and B6 Vitamins Content and Some Elements in the Main Rice Brands in the Iranian Market
Volume: 20
Issue: 2
Author(s): Gholamreza Asadikaram, Saam Norouzi, Tahereh Khalili, Moslem Abolhassani, Masoud Torkzadeh-Mahani, Mohammad Reza Hajizadeh and Zakaria Vahabzadeh*
Affiliation:
- Department
of Biochemistry, Faculty of Medicine, Kerman University of Medical Sciences, Kerman. Iran
- Liver & Digestive Research Center, Research Institute for Health
Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
Keywords:
Rice cooking procedure, B1 vitamin, B2 vitamin, B6 vitamin, HPLC, trace elements, atomic absorption.
Abstract:
Aims: The aim of the present study was to assess and compare the effect of different
methods of cooking on B-group vitamins (B1, B2, and B6), As, Cd, Ni, Pb, and some essential elements
(Cu, Co, and Mn) in the main local varieties of Iranian rice.
Background: Different cooking procedures have been shown to have contradictory benefits in
terms of nutritional value by affecting the bioavailability of vitamins and microminerals.
Objective: The aim of the present study was to assess and compare the effect of different methods
of cooking on B-group vitamins (B1, B2 and B6), As, Cd, Ni, Pb, and some essential elements
(Cu, Co, and Mn) in the main local varieties of Iranian rice.
Methods: The effectiveness of different cooking procedures, including direct cooking
(Dampokht) and cooking by washing the rice with water and draining off the water (Abkesh), on
B1, B2, and B6 vitamins contents and Cd, As, Pb, Ni, Cu, Co, Mn elements in the different local
varieties of Iranian rice was evaluated. For the Dampokht method, the non-rinsed cooked samples
were directly used for evaluation, but for the Abkesh method, the cooked rice samples were first
rinsed and then evaluated.
Results: Generally, our results showed decreased levels of vitamins and trace elements in cooking
with the Abkesh method in comparison to that of Dampokht. Interestingly, the amount of B1 vitamin
increased after the Dampokht method.
Conclusion: The results indicate that the rice cooking procedure is very important in the maintenance
of B vitamins and trace elements in the foodstuff, and the Abkesh method leads to the loss
of a great deal of water-soluble vitamins and essential elements. However, it is good for decreasing
poisonous heavy metals and should be recommended for populations that consume rice as the
main staple food and who live in the areas with a high level of toxic heavy metals in drinking water.